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Power surge when pc turned off?

  • 28-05-2009 8:21pm
    #1
    Alkers
    Registered Users, Registered Users 2 Posts: 6,915 ✭✭✭


    House had a powercut in the early hours of Wednesday morning. Since then my pc won't turn on. Nothing else in the house is in any way damaged and I've tried the computer in other sockets with nothing, even the LED on the mobo doesn't turn on.
    Can a power surge damage one applieace like that, even if it's turned off?
    PC is a self build: socket 939 dualcore CPU, 2 gig ram, 2xHDD and a Geforce9600 I think (specs are on the computer!) and the PSU is a Antec NE 480GB (again not sure) but it was very expensive when I bought it.
    Is there anywhere in a PSU or on the mobo I could test with a multimeter to try and work out whats wrong as I've no spare parts whatsoever anymore.
    Thanks


Comments

  • #2
    awkward
    Closed Accounts Posts: 64 ✭✭awkward


    most likely psu is borked. may be just blown psu fuse


  • #3
    TinCool
    Registered Users, Registered Users 2 Posts: 2,894 ✭✭✭TinCool


    It is very likely that if you did indeed experience a surge when the power cut occurred that it damaged the PSU on your PC. It wouldn't have to be turned on for that to happen as there would always be a small current running from the PSU to motherboard. If you have an LED on your motherboard, it will usually be lit, whether the PC is turned on or not.

    I have had 2 PSU's blow on me (one of which completely fried my motherboard) due to dodgy electrics in my house. After I replaced the 2nd PSU I invested in a heavy duty power surge plug bank. Get the best one that you can afford. I already had a power surge plug bank that I had purchased from the likes of Homebase already when the previous two PSU's bit the bullet so be wary just because it is surged protected does not necessarily mean it will withstand all surges.

    As the previous poster suggested, it may well be just the fuse in your plug. Try a different power cable to see if that's the case first.


  • #4
    Capt'n Midnight
    Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 94,294 Mod ✭✭✭✭Capt'n Midnight


    The key point here is that the PC was not off , it was in standby
    OLD type PC's disconnected the mains so an off PC was safe.

    Modern ones always supply low power to the switch which is why they don't clunk any more, and also means the PSU is always exposed to mains problems :(


    if the power surge was lightening related then there is a good chance more than just the PSU was damaged so don't trust that hard drive , and backup any stuff you need as soon as you can :(


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